2.3 population ecology

Question 1

What are some factors that affect population growth rate?

Answer 1

generation time, sex ratio, and age structure

Question 2

What is generation time?

Answer 2

age females reproduce

Question 3

What is sex ratio?

Answer 3

number of females v. males

Question 4

What is age structure?

Answer 4

number of females of reproductive age in cohort

Question 5

if there are less females than males, will the population growth be higher or lower?

Answer 5

lower

Question 6

if the generation time is shorter, will the population growth be higher or lower?

Answer 6

higher

Question 7

If there are more people of reproductive age than children, will is the population growth higher, lower, or average?

Answer 7

lower

Question 8

Describe stage one of the demographic transition

Answer 8

Birth rate and death rates are high, stable increase in pop. growth

Question 9

Describe stage two of the demographic transition

Answer 9

Birth rates are high, death rates are low, rapid increase in pop. growth

Question 10

Describe stage three of the demographic transition

Answer 10

Birth and death rates are falling, pop. growth increase slows down

Question 11

Describe stage four of the demographic transition

Answer 11

Birth and death rates are low, pop. growth falling and then stable

Question 12

Describe stage five of the demographic transition

Answer 12

Birth rate yet to be seen, death rate is low and little change in pop. growth

Question 13

What is the equation for population growth?

Answer 13

birth rate - death rate/1000 * 100

Question 14

What is GDP per capita?

Answer 14

A country’s economic output per person

Question 15

What is infant mortality rate?

Answer 15

The probability of the death of an infant before their first birthday